249+ iOS apps curated and reviewed
From beginner-friendly picks to power-user tools, our free frequency detector list covers 249+ iPhone apps updated through August 2026. Compare ratings, prices, and screenshots in one place.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.0★ (4) | Yes | No | Aug 2026 |
| 2 |  | Free | 5.0★ (1) | No | No | Jun 2026 |
| 3 |  | Free | — | No | No | Jul 2026 |
| 4 |  | Free | 5.0★ (1) | No | No | Aug 2026 |
| 5 |  | Free | 4.5★ (155) | No | Yes | Aug 2026 |
| 6 |  | Free | 4.5★ (3.5K) | Yes | No | Aug 2026 |
| 7 |  | Free | 4.3★ (12) | No | Yes | Aug 2026 |
| 8 |  | Free | 4.4★ (315) | No | Yes | Aug 2026 |
This app transforms your iPhone into a powerful audio analyzer. It offers four distinct modes to measure sound frequencies, tune instruments, analyze motor speeds, and check mains stability. Advanced features include measurement history, comparison tools, and CSV export.
Instantly discover the tuning frequency of music around you. This app uses song recognition and advanced analysis to reveal if a track is tuned to standard concert pitch or other frequencies, offering a new dimension to your listening experience.
Instantly analyze musical keys from any frequency in Hertz. It displays the corresponding musical note, cents deviation, and whether it's in key with your selected musical scale. Features vocal context notes and a full frequency chart for EQ guidance.
Transform your device into a professional audio analysis tool with advanced FFT analysis, SPL monitoring, and detailed visualizations. Record, analyze, and export audio data with precision calibration and multiple weighting filters.
Scan and analyze all devices connected to your local network. This essential tool helps protect your privacy by identifying everything on your network. Regular updates ensure an improved user experience.
This application transforms your device into a precise sound analysis tool. It offers real-time frequency detection, visualization, and data logging for musicians, engineers, and curious individuals. Gain clarity and accuracy in understanding the soundscape around you.
Transform your iPhone into an EMF detector to monitor electromagnetic fields. Identify radiation levels in various environments to assess safety at home, work, or in public spaces. Gain insights to make informed decisions about your surroundings.
Visualize sound waves in real-time by detecting and displaying their frequencies in Hertz. Experience an augmented reality view of the audio environment around you.
This application offers real-time radio frequency signal detection and analysis. It monitors signal strength, analyzes frequency bands, and identifies interference sources. The tool provides historical data and network optimization insights for a better wireless experience.
Generate various sound waves, including sine, square, sawtooth, and triangle, with adjustable frequencies from 1Hz to 22000Hz. Visually observe animated sound waves and control volume. Useful for testing hearing, speakers, instruments, and even cleaning water from speakers.
This app helps you monitor your surroundings by detecting radiation levels and measuring ambient sound. It offers real-time readings, customizable thresholds, and alerts for potential hazards. The intuitive interface makes it easy to stay informed about environmental safety.
Verify your device's hardware and sensors are functioning correctly. Features include water ejection, audio and screen tests, noise measurement, CPU usage, frequency generation, network speed checks, and vibration tests.
